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1997 (1)
1Author    Atthias Lemke, Falk Knoch, Horst KischRequires cookie*
 Abstract    The dication of tetrakis(dimethylamino)ethene (TDAE2+) forms ion pair complexes with [M(mnt)2]2~, mnt2-= maleonitrile-2,3-dithiolate, M(II) = Ni, Pd, Pt, and Zn. According to X-ray analysis the structure of {TDAE2+[Pt(mnt)2]2~ } consists of a chain-like arrangement o f planar dianions and twisted (71°) dications. Shortest interionic contacts are 11 pm longer than the corresponding van der Waals radii. In the UV-VIS diffuse reflectance spectra of the complexes with a d8 central metal there is no unambiguous evidence for the presence of an ion pair CT band. This band is observed, however, at 450 nm when the d 10 metal Zn(II) is present. Application of the Hush-Marcus model affords a reorganization energy of 110 kJ / mol for electron transfer from [Zn(mnt)2]2-to TDAE2+. This value is 40 kJ / mol higher than the one reported for the analogous complex wherein TDAE2+ is replaced by a 2,2'-bipyridinium acceptor of similar reduction potential. 
  Reference    (Z. Naturforsch. 52b, 65—68 [1997]; received April 1 1996) 
  Published    1997 
  Keywords    Ion Pair Charge-Transfer, Optical Electron Transfer, X-ray 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0065.pdf 
 Identifier    ZNB-1997-52b-0065 
 Volume    52